Unable to connected the USG6600 with MAC Book via SSL VPN

Customer using SVN client to connect to USG gateway using SSL VPN. All users are working fine except MAC Book device

Product :USG6600

Version: V1R1C30SPC100

Mac Book OS as follow:

Handling Process

We have tried to let customer use new client "secoclient" but we received below error.

Root Cause

For the issue, because of the compatibility issue.
SVN client cannot run MAC OS with customer current version of firewall, and Secoclient also cannot run MAC and windows OS with customer current version of firewall.